linux-kernel - Re: [3.7.0 regression] rt2x00lib_probe_dev: Error

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Date:	Mon, 17 Dec 2012 07:59:06 -0500
From:	"devendra.aaru" <devendra.aaru@...il.com>
To:	Mikael Pettersson <mikpe@...uu.se>
Cc:	linux-wireless@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [3.7.0 regression] rt2x00lib_probe_dev: Error - Failed to
 initialize hw

On Mon, Dec 17, 2012 at 7:22 AM, Mikael Pettersson <mikpe@...uu.se> wrote:
> devendra.aaru writes:
>  > On Mon, Dec 17, 2012 at 5:51 AM, Mikael Pettersson <mikpe@...uu.se> wrote:
>  > > I just updated an old 1st gen AMD64 laptop from kernel 3.6.0 to 3.7.0,
>  > > Fedora 15 user-space, and was greeted by the following kernel warning:
>  > >
>  > > WARNING: at net/wireless/core.c:389 wiphy_register+0x5c3/0x600 [cfg80211]()
>  >
>  > I am seeing this line actually when i do vim +389 net/wireless/core.c.
>  >
>  >                 u16 all_iftypes = 0;
>  >
>  > its good if you tell us the top sha1 of yours?
>
> It's the plain linux-3.7.tar.xz from kernel.org, no git involved.
> Lines 389-390 of net/wireless/core.c are:
>
>                 if (WARN_ON(c->max_interfaces < 2))
>                         return -EINVAL;
>

so its v3.7 tag hash 29594404d7fe73cd80eaa4ee8c43dcc53970c60e.

i see that code line :). thanks

i traced a while and looked at the rt2500pci.c code and there we are
assigning the max_ap_intf variable to 1. the same go with the
rt2800pci.c

here's the part of the ops structure

static const struct rt2x00_ops rt2500pci_ops = {
        .name                   = KBUILD_MODNAME,
        .max_ap_intf            = 1,
        .eeprom_size            = EEPROM_SIZE,
        .rf_size                = RF_SIZE,
        .tx_queues              = NUM_TX_QUEUES,
        .extra_tx_headroom      = 0,
        .rx                     = &rt2500pci_queue_rx,
        .tx                     = &rt2500pci_queue_tx,
        .bcn                    = &rt2500pci_queue_bcn,
        .atim                   = &rt2500pci_queue_atim,
        .lib                    = &rt2500pci_rt2x00_ops,
        .hw                     = &rt2500pci_mac80211_ops,
#ifdef CONFIG_RT2X00_LIB_DEBUGFS
        .debugfs                = &rt2500pci_rt2x00debug,
#endif /* CONFIG_RT2X00_LIB_DEBUGFS */
};

i really dont know why is that max_ap_intf is 1. may be some wireless
dev's know about this?


> /Mikael
>
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